The Cubs have had their share of heartbreaking spring training injuries, including Kerry Wood's season-ending elbow injury in 1999 and Mark Prior's Achilles tendon injury in 2004.So when Starlin Castro pulled up lame while running to first in the fourth inning of Wednesday's Cactus League game against the Dodgers, most of the crowd of 4,572 feared the worst."It was not a good (first) thought," manager Dale Sveum said. "He pulled up quite a bit. I didn't know if it was a knee. When most guys do it, they grab (the leg). He was just kind of hobbling. Thank God, it doesn't seem to be a big deal at all."

Castro was pulled from the game, but the Cubs said afterward he is day-to-day with left hamstring tightness.In a spring that already has seen Ian Stewart out with a quad strain and Matt Garza's ailing side delaying his elbow rehab, losing Castro for any significant time would be devastating to the Cubs.Was it scary?"Yeah," Castro replied. "I feel too good this year to start the season hurt. The trainer took care of me. It's not bad. I feel like when you have a charley horse, not like it's (strained) or anything like that."Castro was trying to beat out an infield single to shortstop Dee Gordon when he slowed down and began limping toward first."I was close to first base and I felt it when I touched the base," Castro said.The Cubs trainer came out to talk to Castro, and Castro was pulled.Castro said he never has had a hamstring injury before, and he never has spent time on the disabled list. He's tentatively scheduled to be in Thursday's lineup against the A's, but that figures to change. Either way, Sveum and Castro both said he's unlikely to be out long.- See more at: http://www.chicagotribune.com/sports/baseball/cubs/chi-castro-20130227,0,6552536.story#sthash.Q4LGlSp0.dpuf